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Naked bike · 2021

Mirage 125

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MotoLibrary Score
37 /100 Commuter
Power/Weight
0.06 hp/kg
Top Speed
110 km/h
Engine
124 ccm

2021 Herald Mirage 125 Technical Analysis & Specification Breakdown

Built around Herald's naked motorcycle platform, the 2021 Herald Mirage 125 relies on a 124 cc (7.6 cu in) air-cooled single cylinder, four-stroke powerplant. In factory specification, peak output is rated at 9.5 HP (6.9 kW), transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 76.6 HP per liter, the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.

On the scales, the Mirage 125 measures 152 kg (335 lbs) dry, translating to a power-to-weight ratio of 0.06 HP/kg (16 kg per horsepower). Rider ergonomics and chassis geometry center around a 800 mm (31.5 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance. The 14-liter (3.7 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 110 km/h (68 mph).

Within MotoLibrary's Herald archive, this model family spans 2 indexed model years from 2019 to 2021, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.

Specific Output
76.6 HP/L
Power-to-Weight
0.06 HP/kg (16 kg/HP)
Standover Height
800 mm (31.5 in)
Engine
Displacement 124.0 ccm (7.57 cubic inches)
Engine Type Single cylinder, four-stroke
Power 9.5 HP (6.9 kW))
Fuel System Injection
Cooling Air
Transmission
Gearbox 5-speed
Final Drive Chain (final drive)
Performance
Top Speed 110.0 km/h (68.4 mph)
Chassis
Frame Type Steel
Front Suspension Telescopic fork
Rear Suspension Twin shocks
Wheels & Brakes
Front Brakes Single disc
Rear Brakes Single disc
Wheels Wire spoked
Dimensions & Weight
Dry Weight 152.0 kg (335.1 pounds)
Power/Weight 0.0625 HP/kg
Seat Height 800 mm (31.5 inches) If adjustable, lowest setting.
Fuel Capacity 14.00 litres (3.70 US gallons)
Other
Starter Electric
Color Options Blue, Black, Red
Notes

UK brand.

More from Herald
Buying Checklist

Before You Compare This Bike

Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.

Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
Rider Profile

Who Is This Bike For?

🟢
Beginner
A2 license compatible, manageable power.
🏍️
Best For
City & Weekend Rides
📏
Seat Height
80 cm / 31.5 in
⚖️
Handling
Manageable weight for most riders
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